Tubular woven cotton pick sack and method of forming same



Feb. 28, 1961 D. W. KERN ETAL D N A KV Am SA KS mm Pm WR TO TF O F CO mDVO OH WT Rm A L U B U T 2 Sheets-Sheet 1 Filed Oct. 14, 1957 f ,A l 1.ff ,769676,

Feb. 28, 1961 D. W. KERN ETAL TUBULAR WOVEN COTTON PICK SACK AND METHODOF' FORMING SAME Filed oct.' 14, 1957 2 Sheets-Sheet JNVENToRs wus nl.KERN a Ams/vez: MGGART United States :Patent TUBULAR WOVEN COTTON PICKSACK AND METHOD OF FORMING SAME Filed Oct. 14, 1957, Ser. No. 689,938

8 Claims. (Cl. 28-74) This invention relates to cotton pick sacks of thetype that are used by pickers in harvesting cotton, and moreparticularly to an improved form of cotton pick sack that ischaracterized by a tubular woven body portion having a wear resistantsurface .coating carried directly at one face thereof and to the methodby which this improved cotton pick sack is formed.

Briey described, the cotton pick sack of the present invention isprovided by weaving a tubular web with single ply portions formedtransversely therein at a spacing lengthwise of said web correspondingto the length of pick sack desired, then coating spaced portions at oneface of the tubular web reaching lengthwise thereof in relation to thesingle ply portions in a sufficient extent sack structure, all of whichprovides a substantial saving in both material and labor as well asproviding an excellent cotton pick sack.

These and other features of the present invention are described infurther detail below in connection with the accompanying drawings, inwhich:

Fig. 1 is a plan view showing the top surface of a representative cottonpick sack structure embodying the present invention;

Fig. 2 is a corresponding plan lview showing the bottom surface of thecotton pick sack illustrated in Fig. l;

Fig. 3 is an enlarged fragmentary sectional detail taken substantiallyon the line 3 3 in Fig. 2;

Fig. 4 is an enlarged fragmentary detail taken substantially on the line4-4 in Fig. 2; and

Fig. 5 is a fragmentary plan view showing the form of tubular web fromwhich the cotton pick sack illustrated in Figs. 1 and 2 is formed.

Referring now in detail to the drawings, the embodiment of the presentinvention shown in Figs. 1 and 2 comprises a cotton pick sack having atubular woven body portion, as indicated generally by the referencenumeral 10; the bottom end of which is closed by a relatively narrow,single ply, woven portion 12; and the open top end of which is seamed,as at 14, along that part of the top edge of body portion 10corresponding to the upper surface of the pick sack when in use, as seenin Fig. 1, while the remainder of the body portion top edgecorresponding to the lower face of the pick sack, as seen in Fig. 2, hasa bib portion 16 seamed thereat with a shoulder strap 18 installedthereon in the usual manner.

The lower surface of the pick sack, as seen in Fig. 2, also has a wearor drag surface applied directly thereto as indicated at 20; this wearsurface 20 being formed by a coating of a thixotropic thermoplasticcomposition apice as Patent No. 2,893,314, or alternatively including abase coating. Y

Fig. 3 illustrates the tubular woven form of the bod portion 10 with thewear surface 20 applied at one face thereof, and Fig. 4 furtherillustrates the arrangement of the bottom end closure formed by thesingle ply portion 12, while Fig. 5 illustrates the manner in which thebody portion 10 isr provided in this form from a tubular woven web W,the web W being formed of any usual pick sack material, commonlyOsnaburg, andbeing tubular woven according to conventional practice withsingle ply portions formed transversely therein at a spacing lengthwiseof the web corresponding to the length of pick sack desired.

In the form illustrated in Fig. 5, for use in forming the pick sackstructure illustrated in Figs. 1 and 2, the Web W has relatively narrowsingle ply portions 12, of the order of about one inch in width, woventransversely therein to form the previously noted bottom end closure,and these single ply portions 12 are spaced lengthwise in the web W incorrespondence with the length of tubular body portion 10 to be providedso that the web W com? prises tubular body portions 10 connectedcontinuously at the single ply portions 12 as illustrated in Fig. 5.

Having provided the web W in this manner, the wear surfaces 20 are thenapplied at one face thereof at the proper spacing as disclosed by theabove noted copendng application Serial No. 685,966 which describes indetail an arrangement of means for such spaced coating of we b material.As illustrated in Fig. 5 the wear surfaces 20 may be spaced to extendlengthwise of the web W in one direction from the single ply portions12, Vso that the web W becomes a series of tubular body portions 10arranged kto be separated readily by severing the web W transversely atthe edges of the single ply portions 12 opposite the direction in whichthe wear surfaces 20 extend therefrom. This severing operation can beaccomplished by any convenient manner, such as pinking, to provide thetubular body portions 10 in unit form ready to be finished at their topends by seaming and attachment of a bib portion 16 and shoulder strap 18thereto as seen in Figs. 1 and 2.

Alternatively, the pattern of the single ply portions 12 can be variedin the web W if desired. For example, the single ply portions 12 mightbe formed in approxif mately twice the width indicated in Fig. `5, andthe lengthwise spacing thereof increased to correspond with twice thelength desired for the tubular body portions 10 in forming the web W,and the web W thus formed might have wear surfaces, such as indicated at20 in Fig. 5, applied in both directions from the wider single plyportions and then be severed midway of the width of, and midway between,these wider single ply portions to obtain the unit tubular body portions10 therefrom. Additionally, it is possible to provide an integral bibportion, such as is indicated at 16 in Figs. 1 and 2, on the tubularbody portion 10` by simply forming single ply portions in the web Whaving suicient single ply width to afford the necessary material for abib portion such as 16. If this is done, the tubular body portions asseparated from the web are closed at their top, as well as bottom, endsand it is accordingly necessary to slit the body portions adjacent theintegral bib portions in order to provide an open top end, and thechoice of forming an integral bib portion in this manner, asdistinguished from attaching a separate bib portion 16 as illustrated inFigs. 1 and 2, is largely a matter of the relative adaptability tofacilities available for the top end finishing operations.

In connection with the wear surfaces 20 provided on Patented Feb. 28,1961 the tubular body portions 10, as described above, it-

should be noted that a thixotropic thermoplastic composition of the typereferred to in the above identified copen'ding applications may beapplied to the tubular web W'without any diiculty whatever with foulingof the two ply web portions by bleeding through. Also, by applying thewear surfaces -so that they extend across the single ply bottom closureportions 12 any tendency of these portions to ravel can be eliminatedeffectively.

, Furthermore, it should also be noted that the wear surfaces 2li rnaybe applied directly to the web W in the above indicated manner becausethe web W is tubular woven according to the present invention so that itdoes not need to be seamed in forming the sack structure 10A therefrom,as previously mentioned, and consequently does not require turninginside out after seaming in accordance with usual practice. Aviso, dueto this absence of seams the inside of the resulting sack structure 10is entirely smooth so as to be much more easily emptied of picked cottoncollected therein than the conventional sack structure in which rawcotton has a pronounced tendency to hang at the inturned seams.Additionally, the tubular woven sack structure 10 has the necessary sideedge strength provided therein by the tubular woven selvages andexceptional bottom end strength due to the double density of the singleply portions 12.

The present invention has been described in detail above for purposes ofillustration only and is not intended to be limited by this descriptionor otherwise except as defined in the appended claims;

We claim:

1. The method of forming a cotton pick Ysack which comprises weaving atubular web, joining the opposite faces of said web transversely atintervals lengthwise of said web based on a multiple of the length ofpick sack. desired, coating spaced surface portions on one face of saidweb adjacent the transverse joints in a suicient extent to provide awear surface for said pick sack, and subsequently severing said webtransversely at said joined opposite faces.

2. The method of forming a cotton pick sack which comprises weaving atubular web with single ply pora tions formed transversely therein andspaced lengthwise thereof in a pattern based on twice the length of picksack desired, coating spaced surface portions at one face of said web,said coated portions including a single ply portion with each saidcoated portion extending into the tubular portions adjacent said singleply portion in an extent sufficient to provide a pick sack wear surfacein both directions therefrom, and subsequently severing said webtransversely midway of each of said single ply portion and midwaytherebetween.

3. The method `of forming a cotton .pick sack which;V

` ply portion and extending into at least one tubular portion adjacentsaid single ply portion in a sufficient extent 'to provide a wearsurface for said pick sack, and subsequently severing said webtransversely at the edges of said single ply portions opposite thedirection in which 'said coated surface portions reach therefrom.

4. The method defined in claim 1 and further characterized in that saidspaced surface portions of said web are coated with a thixotropicthermoplastic composition.

5. The method defined in claim 1 and further characterized in that saidweb is severed by pinking.

6. The method defined in claim 2 and further characterized in that theends of said web severedmidway bctween said single ply portions arehemrned and a bib andV shoulder strap is attached thereat along the edgeportion corresponding to the web face at which said wear surface isprovided.

7. The method defined in claim 3 and further characterized in that thesevered ends of said web opposite' said single ply portions are hemmedand a bib and shoulder strap is attached thereat along the edge portioncorresponding to the web face at which said wear surface is provided.

8. The method of forming a cotton pick sack which comprises weaving atubular web, joining the opposite faces of said web transversely atintervals lengthwise otsaid web based on a multiple of the length ofpick sacl:` desired, coating spaced surface portions on one face of saidweb adjacent and upon the transverse joints in a suiiicient extent toprovide a wear surface for said pick` sack, and subsequently severingsaid web transversely at said joined opposite faces.

References Cited in the le of this patent UNlTED STATES PATENTS 6,566Carlock July 3, 1849 303,211 Bray Aug. 5, 1884 358,265 Hardenbrook Feb.22, 1887 1,612,022 Howarth Dec. 28, 1926 2,208,256 Goldsmith July 16,1940 2,471,380 Wallworlt May 24, 1949 2,603,265 Sommes July 15, 19522,707,318 ODon'nell May 3, 1955 2,734,541 Ottinger Feb. 14, 19562,770,026 Petersilie Nov. 13, 1956 2,845,688 Ainslie Aug. 5, 1958

